All whom it may concern



@with tstee datrat @fitta S. A. MORSE, OFVNEW BEDFURD, MASSACHUSETTS.

Letters Patent Ifo. 63,929, dated April 16, 1857.

MPROVED CLAMP.

TO. ALL WHOM IT MAY CONGERN;

Be it known that I, S. A. MORSE, of New Bedford, in the county ofBristol, and State of Massachusetts, have' invented a new and improvedClamp for holding articles while being planed or milled; and do herebydeclare that the following is afull, clear, and exact descriptionthereof, which will enable others skilled in the art to make and use thesame, reference being had to the accompanying drawings, forming part ofthis speciication, in which- Figure 1 is a side sectional view of myinvention, taken in the line x :6,'tigL 2.

Figure 2, a plan or top view of the same. l

Figure 3, a transverse vertical section of the stock and slide of thesame, taken in the line y y, iig. 2.

Similar letters of reference indicate like parts.

This invention relates to a new and improved clamp for securing articlesfirmly in position while being planed or milled. The object of theinvention is to obtain a device, for the purpose specified, which willadmit of the articles heilig not only clamped with facility or veryexpeditiously, but also in proper position relatively with the cuttingtool in every instance.

A represents what may be termed the stock of the device, the saine beingcomposed of a rectangular block having an upright ledge, a, extendingentirely across it at right angles. B representsa sliding plate, whichis fitted on the stock A, the lower or under side of lB being providedwith a longitudinal cleat, b, having dove-tail sides, c, said cleatbeing fitted within a longitudinal groove, d, in A, having inclined ordove-tail sides, e, as shown clearly in fig. 3. By this arrangement theplate B is allowed to slide freely forward and backward on the stock Awithout being permitted to rise or move casually upward. 0n the uppersurface of the sliding plate B there are two vertical ears or lugs ff,between which a lever, C, is tted, and works on a fulcrum pin, g, andthe front end of this lever is rounded or made in cylindrical form tofit into a socket, L, of corresponding shape, made in a square plate, D,as shown clearly in iig. 1. The lever-C is operated or adjusted by meansof a cam, E, fitted in the outer end of the plate B, as shown in gs. 1and 2. The sliding plate B is adjusted by a screw, F, which is fittedlongitudinally in the stock A, and works in an internal screw-thread inthe plate B, as shown Yin fig. 1, the screw F having a square, z', onits outer end to receive a key by which the screw is turned. i

The operation is asfollows: The stock A is secured in the bed of aplaning or other machine used to operate upon the. work, and the articleG to be planed is fitted on the stock A and against the ledge a, betweenit and the plate D on the inner or front end of the lever C, which endis in an elevated state, it having been raised by adjusting the cam E soas to admit of G being inserted in the place specified. The outer end ofthe lever C is then forced upward by actuating the cam E, and the frontend of thelever G thereby forced down, which causes the plate D to rmlyclamp the article G or bind it against the ledge a. The upper side of Gis then plaued or milled, and after that is performed the cam E isactuated so as to let down' the outer end of C, and G is Vturned betweena and B -so that another side o'f it will be uppermost, the outer end ofC being again forced upward, and G thereby clamped in position andthesucceeding side planed or milled.. The plate B is adjusted to suitdiierent-sized articles Gwhich are to beoperated upon, said plate beingadjusted so as to leave a requisite space between D and a to admit of Gbeing inserted between them when D is raised, and at the saine timeadmit of D when forced down pressing firmly against G. The plate D, itwill be seen, in consequence of being attached to lever C, as shown, isrendered self-adjusting, and always presses against G parallel with thesurface with which it is in contact. Thus it will be seen that by thisextremely simple device articles may be firmly and expeditiously clampedin position for the purpose of being planed ormlled, and the article, bythe process of clamping, will be brought in a proper relative positionwith the cutting-tool, for theA pressure of the plate D against G, whenthe cuter end of lever C is forced upward, is brought forward towardsthe ledge a and downward towards the upper surface of the stock A, henceG will bebrought firmly against a and down upon A.

I do not confine myself to the use cfa cam,E, for operating or adjustingthe lever C, as other devices may i be used for` that purpose and answerequally as Well. It will of course be understood that the centre of theplate D is above the fulcrum-pin g of the lever G, in order to admit ofsaid plate and lever operating as described.

Having thus described my invention, I claim as new, and desire to secureby Letters Patent- The stock A, providediwith an upright ledge orbearing surface, a, in combination with the sliding plate B, providedwith the lever C having the self-adjusting plate D attached, andoperated by the cam E, or its eq uivalent, substantially as and for thepurpose herein set forth. j

i S'. A.. MORSE.

Witnesses:

WM. L. KELLEY, GEORGE Putman.

